Sometimes explicit sex is thematically important to a story and sometimes it is not. Sometimes explicit bigotry is and sometimes it isn’t. Sometimes violence is necessary to deliver a stories tone and immerse yourself in the characters perspective correctly and sometimes it isn’t
The inclusion of taboo subjects in a work of art isn’t inherently there as indulgence for the author, even if it is displayed graphically and without censorship. However in the case that it is you have to remember to not find fault in the raw content itself but rather the creators handling of it. When consuming media critically you must always be aware of its creators, first and foremost. There is no analysis without analysis of the brain behind it, because unlike the real world fiction is a product of someone else’s will and cognition